# CVE-2026-86406

## Summary

- **CVE ID:** CVE-2026-86406
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 13, 2026
- **Last Modified:** Sep 13, 2026

## Description

The User Registration & Membership  WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.

## Affected Products

- Unknown — User Registration & Membership (4.4.6)

## References

- [CNA](https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 8.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._